The average dose range is 10-50 mg of CBD, one to three times per day, though much higher doses of 100-200 mg (sometimes required to control pain) are equally well tolerated. Some people will notice benefit at the lower end of the dose range, but most people will need 15-30 mg to notice any effects. Because different products provide different concentrations of CBD, the packaging usually states how much CBD is in the entire bottle as opposed to the amount in a certain number of drops or dropperfuls, so measuring can be a little tricky. If you’re taking the oil in liquid form, one dropperful of a low concentration product (100 mg CBD per fluid ounce) will provide about 3 mg of CBD per dropperful — not enough to notice any significant effects. A dropperful of the medium grade product (500 mg of CBD per fluid ounce) will deliver about 15 mg of CBD — a good starting dose. And a dropperful of a high concentration product (1500 mg CBD per fluid ounce) will provide about 50 mg of CBD per dropperful.